Question 1

Which of the following best describes homeostasis in the human body?

Accepted Answer

The process by which the body maintains a stable internal environment despite changes in external conditions.

Question 2

Which of the following is an example of negative feedback in homeostatic regulation?

Accepted Answer

Regulation of blood glucose by insulin.

Question 3

What is the main difference between organic and inorganic compounds?

Accepted Answer

Organic compounds contain both carbon (C) and hydrogen (H), while inorganic compounds may lack either or both.

Question 4

Which property of water allows it to transport nutrients and waste in the body?

Accepted Answer

Polarity

Question 5

What happens to a red blood cell when placed in a hypotonic solution?

Accepted Answer

It swells and may burst due to water entering the cell.

Question 6

Which organelle is responsible for ATP production in eukaryotic cells?

Accepted Answer

Mitochondrion

Question 7

During which phase of the cell cycle does DNA replication occur?

Accepted Answer

S phase

Question 8

Which layer of the epidermis is only found in thick skin?

Accepted Answer

Stratum lucidum

Question 9

Which cell type in bone tissue is responsible for bone resorption?

Accepted Answer

Osteoclast

Question 10

Which hormone increases blood calcium levels by stimulating osteoclast activity?

Accepted Answer

Parathyroid hormone (PTH)

Question 11

Which of the following mechanisms can skeletal muscle use to generate ATP during intense exercise?

Accepted Answer

Anaerobic glycolysis and creatine phosphate

Question 12

What is the role of acetylcholine (ACh) at the neuromuscular junction?

Accepted Answer

It triggers the release of calcium from the sarcoplasmic reticulum.

Question 13

Which part of the neuron receives incoming signals from other neurons?

Accepted Answer

Dendrite

Question 14

What is the effect of sympathetic nervous system activation on the heart?

Accepted Answer

Increases heart rate and force of contraction

Question 15

Which hormone is released from the adrenal medulla in response to stress?

Accepted Answer

Epinephrine

Question 16

Which of the following best describes the process of endochondral ossification?

Accepted Answer

Hyaline cartilage is replaced by bone, but cartilage remains in articular cartilage and epiphyseal plates.

Question 17

Which of the following is a function of the integumentary system?

Accepted Answer

Regulation of body temperature and protection against pathogens

Question 18

Which of the following equations correctly represents cellular respiration?

Accepted Answer

$$\mathrm{C_6H_{12}O_6$} + 6\mathrm{O_2$} \rightarrow 6\mathrm{CO_2$} + 6\mathrm{H_2O} + \mathrm{ATP}$$

Question 19

Which of the following best explains the role of sodium-potassium pumps in neurons?

Accepted Answer

They maintain the resting membrane potential by actively transporting $$3\mathrm{Na^+}$$ out and $$2\mathrm{K^+} in.$$

Question 20

Which hormone is released from the posterior pituitary and is involved in water retention?

Accepted Answer

Antidiuretic hormone (ADH)

Comprehensive Study Notes for Anatomy & Physiology I Final Exam

Study Guide - Practice Questions